﻿#region copyright
// Halcyone - Silverlight Application Framework
// Copyright (C) 2009 - 2010 Alexey Zakharov (B&Z LLC)
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#endregion
namespace Witcraft.Halcyone.Core
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Reflection;

    using Microsoft.Practices.ServiceLocation;

    public static class MetaExtracter
    {
        public static IEnumerable<TBase> Extract<T, TBase>() where T : TBase 
        {
            Assembly assymbly = typeof(T).Assembly;
            IEnumerable<Type> types = assymbly.GetExportedTypes().Where(IsValidType<TBase>);
            return types.Select(type => (TBase)ServiceLocator.Current.GetInstance(type)).ToList();
        }

        private static bool IsValidType<TBase>(Type type)
        {
            return !type.IsAbstract && typeof(TBase).IsAssignableFrom(type);
        }
    }
}